I find these types of Dragons really difficult to face. One strike with their frost breath wipes out most of my heath. I have beaten some before, but I need easier ways, so feel free to tell me anything -Thanks (I am a Dumner or the Dark Elf btw and I use all magic, but mostley destruction)

7 Answers
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If you can find or make some equipment with either magic or frost resistance, their breath attacks will do less damage to you. Having a companion with you can help by tanking the dragon for you, so you can attack it's side, so it can't hit you with its tail. You can also bash them with a shield during its breath attack to stop it prematurely. It really depends on what kind of character you are.

Another strategy not mentioned is to use the dual casting destruction perk Impact. Assuming your playing a magic-using character of course.

Impact as I understand it normally does not stun dragons, however once you put points into the appropriate "additional damage" perks of whatever school your using (fire, frost, or lighting) it will. While the conditions to meet this status are hazy to me, I know for a fact it works as I've stun-locked dragons many times. Simply stun them as they are about to use their breath attack, and voila.

Rather a high price to pay, but becoming a vampire does the trick. Vampires are 100% resistant to cold, as I found out after several minutes wondering why getting my arse repeatedly frozen by a dragon was doing me no harm :)

Frost dragons are weak to fire. So you should use fire spells.
According to the UESPwiki entry it is 25% and it has a 50% restistance to frost. So don't use frost spells. You can increase the weakness using an aversion to fire potion.

Using a flame atronach as a damage addition and diversion could also be helpful. You can cast this with a scroll, a staff or spell.

Take the Impact perk, as soon as you can. This will stagger dragons if you hit it with a spell casted with two hands (temporarily stopping it from attacking).

You can also use the Dunmer's greater power, Ancestor's Wrath (for 60 seconds, opponents that get too close take 8 points per second of fire damage, once per day), if you find yourself near the frost dragon.

If you also have skill points and perks in Conjuration, the Flame Atronach (ranged fire attack) and the Dremora (wields a sword with Fire enchantment) can also help attack and absorb damage from the dragon. The Flame Atronach is weak to frost, though and will be easily dispatched by a frost dragon, if attacked. However, it is available at just level 25 skill in Conjuration, while to conjure a Dremora, you either need the Sanguine Rose or level 75 skill in Conjuration.